Kloeckner Metals stocks ASTM A588 in coil, cut to length, hot rolled, and discrete formats nationwide. Welding = Excellent. While targeted at more severe wear conditions, Hardox ® 600 can still be cut and welded, making it an excellent choice for high-performance applications. Induction hardened pipe is achieved by a unique heating/quenching process. 11A. For our top pick, we’ve chosen the INEFIL ER70S-6 MIG wire due to its outstanding all-around performance for welding steel. If the weld is to be subjected to wear, it may be capped with a hard facing electrode having a low hydrogen type coating. 625 square feet of 3/4" that is VERY FLAT. The AR400 steel plate is excellent for applications that weldability and formability are a must. For AR 500 it is $1. A high strength material with a yield strength over 100 ksi, QT-100 (ASTM A514) is used in a multitude of applications. AR Medium steel plate grades – which include AR200 and AR235 – have a surface hardness of 180-260 BHN. Specialty Steel Company of America. cs - carbon steel, as - alloy steel other than gr. Hard to to do but not. This temperature shall be maintained while welding, unless a minimum interpass temperature is stated. 5" thick and pinning the tip right to the body. Amarillo. Steel Warehouse supplies ASTM A514 steel (also known as T1) grades A, B, E, F, H, P, Q & S. Knowing both the yield and tensile strength is important because they each have an impact on the production and use of steel (and many other materials, but we will focus on the steel). AR400 Welding & Machining | Associated Steel Corporation Sent by telegraph using Tap. 1045 Steel Round Bars; 4150 Steel Bar; Tensaweld Welding. I am sure somebody will argue with me but we. AR400 Welding & Machining | Associated Steel CorporationAR500 is a quenched & tempered, abrasion-resistant grade of steel plate. Heating will remove the temper, we heat AR to soften it for drilling holes into it. lorenzo. Alpharetta (Atlanta Plate Processing) 2005 Grassland Pkwy. This materials is an Abrasion Resistant, Thru-Hardened, Alloy product. Hardox is not an alloy of steel but a company in Sweden that makes a high quality AR plate. Welding Ar400 Steel Plate (1618 products available) AR200 AR300 AR400 carbon steel plate sizes a36 a38 carbon construction steel s235 s355 steel plate price per kg $670. AR400 steel exhibits the best performance at low oxygen regardless of the velocity. This is used further to. Workmate; MANG-312; Nickel-90; Ultra-100; Ultra-200; Ultra-300; Alumina Ceramic Wear Tile; Personal. 308 I have rocked it at 25 yards with . AR400 Abrasion Resistant, “Thru-Hardened” Wear Plate. It is a silicon killed, coarse grained steel that requires careful welding techniques. This publication is an extract of AWS B2. AR500 is a high-strength, low-alloy steel that offers great weldability, formability, and toughness. #3. This grade steel is a high-strength, low alloy steel plate. 3. 06-10-2010, 01:11 PM. This is for my workbench. Now I'm pretty sure its AR400. Unparalleled Strength. Kloeckner Metals is proud to offer weld. The normalizing process is designed to relieve stresses, which results in improved ductility and toughness. 3 – Structural Welding Code – Sheet Steel AWS D1. Over 1 to 2” 150F-200F. Disadvantages of AR400 steel. on-premise software solutions, CAD file management, compliance, and more. AR450 steel is a high-carbon steel alloy that has a surface hardness between 400-477 BHN. 15% and below creates ductile steel with unbreakable chips. I have quite a bit of 3" angle that is 3/8" thick that I will use for the majority of the frame. ABREX 400, also called SUMIHARD 400, is a union of toughness and hardness, giving it the exclusivity to be used in moderate wear areas. Easy. Post Thanks / Like - 1 Likes, 0 Dislikes. W59, W59. So if you are in that range you will match the ajacent AR plate. Hardox® 400 is an abrasion-resistant steel with a nominal hardness of 400 HBW. Satisfactory machining and welding characteristics. Temper at about 450 degrees F. 316 stainless steel, while both are good for corrosion resistance, strength, welding, and heat resistance, 316 stainless steel gets the slight edge in all these categories due to variation in alloying elements. General Info About AR450 / AR450F. I usually work with 1" and above, and use mist. #3. AR500 and AR600 will last longer and need to be replaced less often for projects that actually beat up the material. AWS B2. (°c) ea2 + uv420ttr flux & el8 + lincoln 780 flux (for pema) e7018 welding consumable chart er80s-b2 e8018-b2 eb2 + uv420ttr flux 350°c 350°c for. Universal Steel provides abrasion resistant steel plate for use in mining, excavating, and heavy machinery manufacturing. Adequate welding procedure. 1. Industries. glass, coke, coal, wood chips, bottom ash, rice, and stone) can cause premature wear. This may also require pre-heat and interpass temperatures depending on the thickness of the metal. The base steel around the weld rapidly heats and cools during welding, resulting in a heat affected zone (HAZ) with high hardness. The base steel around the weld rapidly heats and cools during welding, resulting in a heat affected zone (HAZ) with high hardness. AR400, or AR400F steel, is a high-carbon. heavier thicknesses for internal soundness. #7. Thin-Gauge Sheet Metal Repair Video. Piece of 1-1/2" Thick AR400 Steel. listed below, or any sheet steel qualified in conformance with 1. ). Jeff7 Lifer. Welding of AISI 4140 to 1045 or 1018 material can be carried out using an E8018-B2 stick welding rod or E7018 type electrode. For example : Lincoln 's Lincore 55, Lincore 50 , Lincore15CrMn are all Rc-50 . Welding Ar500 to A36 is possible and can be done through all welding methods. For welds non subjected to wear, following welding products can be used: Processes AFNOR DIN AWS Manual coated electrode A81-309 E51 4/3 B DIN 1913 Class E514/3B10 AWS 5-1. The versatility of AR400 steel plates come from its hardness and overall flexibility. Conventional methods are used for welding AISI 4330 alloy steel. Middletown services the New England & tri-state area including upstate NY, Delaware, Maryland and parts of Pennsylvania. 187) & possibly 1/4" (. Differentiators include hardness levels, application uses, and cost. This will need to be completely rebuilt with AR400 or Wearox down the road and I will have to budget for it. 75 thru tapped holes. What is ar500 steel? AR500 steel plate is chemically similar to AR400 steel plate, except the hardness range is higher and it has more carbon and manganese than AR400. Welding Creusabro® 8000 (ISO/TR 15608 class 3. Choose from our selection of type B steel, including low-carbon steel U-channels, zinc-galvanized low-carbon steel rods, and more. Start running like you just stole third base and your diving for home plate. BTW AR400 is similar to Hardox 400 etc. The number usually refers to the brinell hardness of the plate . Need for Low Hydrogen and Preheat No need to get into specifics but, it is because of the higher alloy content that increases the need for preheat and a low. Thanks for every one's help. I got my hands on a piece of AR400 steel. . AR400 steel sheets. The AR400 steel plate is often used in applications where abrasion-resistant, formability, and weldability are required. Hot Working. 5 mm) thick plate, and at least 110 ksi (758. 96” x 480”. AR400 is a quench and tempered steel and may be difficult to weld due its high strength and harden ability. TriCon TriBraze, the Sequel. I have tapped dozens of holes with one tap and had one hole break a few. AR400 Steel, AR500 Steel, A514, Manganese Steel, Armor Plate + More. It drills like mild steel afterwords. I guess depends on what he means as "better". The only AR plate that I've personally worked with AR plate for steel rifle targets. In cases where base metals less than 3 mm (1/8 in) thick are to be welded to base metals 3 mm (1/8 in) and thicker, the. Over 1 to 2” 150F-200F. Ultima 601 is designed to extend service life where abrasive materials (i. The index lists the terms, symbols, and clauses that are used throughout the code, as well as the references to other standards and publications. AR250 steel plates are made for improved formability with low levels of carbon and sulphur for inclusion shape control. It feeds exceptionally well, so you won’t suffer wire jamming or inconsistent feed rates. The inside width of the tips is 1. The most common mixture is 75% Ar and 25% CO 2. This increases cracking potential. Truck bed and bucket liners are major applications, as well as chutes and gates. Welding Stress Calculations4140 steel is a low alloy steel plate. If you're using AR400 I would think most people would have an adequate machine to run 1/16". It is just 1/4" after all. AR400 plate is suitable for welding. To ensure that the T1 steel weld is successful, preheating and post-heating are both essential components of the welding process. When shopping for an attachment, you’ll find that many manufacturers use A36 steel (36,000 pounds per square inch [PSI] minimum yield strength), which is some of the cheapest steel on the market. Good weld-ability. x 14 in. AR400 Steel Plate – Tensalloy AR400 Armor Plate. Quench the material in light oil heated to 150F. Stick Welding- Creating High Quality Stick Welds. AR400 is formable, to some extent. AR400: This steel provides a high degree of hardness and strength because of its quenched and tempered chrome-moly, boron treatment. Hardox ® 500 Tuf is a clean steel with extremely consistent, guaranteed properties for flatness, thickness and bending performance. For instance, you may need to weld ASTM A387 chrome-moly steel tubes—for a high-temperature. Ensure mill scale in weld area is removed and the plate is always at a temperature >60F. To be classified as AR500, the hardness needs to clock in between 477 BHN and 550 BHN. 45mm and can be beyond 0. A656 is the standard specification for hot-rolled structural steel, high-strength low alloy plate with improved formability. It’s also best to be methodical about weld sequencing, which will also. 145 ksi ;. In most cases you would preheat Q&T plates ( due to its hardenability tendancy ), expecially when you get into the higher harness. Steel Shot Blasting. Years ago I was needing a new cutting edge. 0. The nickel and molybdenum content gives AR400 carbon steel the ability to resist wear better than all other carbon steel. •. 55% carbon, 1065 carbon steel contains 0. Wear Resistance = Great. It is determined based on hardness and it does not have a defined chemistry. AR400 plate is resistant to corrosion from atmospheric conditions and protects well against impact abrasion. The cladding process was performed using metal-matrix composite (MMC) powder belonging to the. The natural presence of manganese in the iron ore used by the Spartans is believed to be why their steel weapons were superior to those of their enemies – USGS. You can find hardness levels for AR400, AR450, and AR500 on their respective pages. Some of the most reviewed products in Welding Rods are the Lincoln Electric 1/8 in. For instance, you can use AR400 to attach to digging blades and others of the like. It has high electrical conductivity and less ductility. Navsea Tech Pub T9074. Founded in 1919, the American Welding Society is a nonprofit organization with a global mission: to advance the science, technology, and application of welding and allied joining and cutting processes worldwide, including brazing, soldering, and thermal spraying. , U. High Chromium, Molybdenum, Nickel Stainless Steel . #3. 25mm, on the other hand, the minimum thickness of the galvanized coating is 0. e. There is no way for a bullet to get to the first plate without sliding down one of the 10 degree plates. 91, ss - stainless steel, n. At minimum, we use Grade 50 steel (50,000 PSI minimum yield strength) for all of our root rake grapples. In contrast, the cost of AR400 ranges from $400 to $650 per tonne. AR400 F Steel Plate is formable grade of Abrasive Resistance Steel Plate designed to accommodate applications where a life of wear is the primary cause for failure among other grades of steel plate. I am building a generous frame but not going too crazy. Edge RetentionI am going to put some new steel targets on my 10 shot KD trailer. The production cost of AR400 Wear resistant steel plate is relatively high, which is much higher than that of simple low carbon steel such as A36 or 1018. Over ½ to 1” 50-150F. As a result, customers can expect longer-lasting wear. The AR400 is also quite hard and strong, but it’s highly regarded for its resistance to both corrosion and impact abrasion. I plan on using 1/4 Ar500 plate but am unsure of the process needed to weld this type of steel. Similar to the annealing process, the steel is heated to a temperature just beyond the critical point (again, the AC3 line) and held for a set period of time. COMMONLY STOCKED SIZES. Bucket Bosses. While targeted at more severe wear conditions, Hardox ® 600 can still be cut and welded, making it an excellent choice for high-performance applications. You will also need a welding rod and a welding helmet. Stick: If you Google TriCon Tri-Braze, it will bring up the data sheets on the chemistry composition and recommended welding proceedures. Experiment with larger bottom dies, which would also probably require more metal on the part sticking up on your skids (so it can bridge the larger die). Industries. The vessel has two tangential inlet nozzles in the section of the vessel where the plate is located. Thanks to the excellent impact and wear resistant qualities of our Tensalloy™ steel wear plate—in particular our AR500 — it is used by a number of industries for their toughest applications. ) are all quenched and tempered but through a higher alloy content, the plate can achieve a much higher hardness and strength. They are generally main match rifle targets shot at about 8 yds. Do You Need AR400 or an AR500 Steel Plate? Choosing whether you need an AR400 or an AR500 wear resistant steel plate will depend on the application. While not a good candidate for forming and machining, AR400 plate is suitable for welding. Welding = Excellent Wear Resistance = Great Excellent resistance to both impact and sliding abrasion at a moderate cost. AR 400 plate. When welding cast iron welders must pay attention to any potential cracking. Tap. AR400F is quenched and tempered through hardened wear resistant grades of abrasion resistant steel plate used for high impact and abrasion resistance. Specifications. We have warehouses in IL/CA/IN/OK/OH with large on-hand inventory. The leftover piece is 32. Quenching occurs by bringing the steel to a high temperate, between 1,500 and 1,650F, then is. A bucket is a inflexible workpiece. This high-strength, quench and tempered alloy steel is perfect for heavy vehicle parts, construction and repairs. ASTM A514 is the standard specification for high yield, quenched and tempered alloy steel plate, suitable for welding. This allowed for reliable performance both in the workshop and in operation. ASTM A572 includes five grades: 42, 50, 55, 60, and 65. Hardox ® 600 for superior wear resistance. Tweet. This wire is designed with 1% nickel and microalloying to produce welds with tougher weld joints. Hardness range is 360/440 BHN with a nominal hardness of 400 BHN. Making some new KD's. Alpharetta, Georgia 30004. Action Target uses a proprietary manufacturing process that maintains the integrity of the steel and keeps the shooting surface perfectly flat. aggregate, and various ground engaging applications. These elemental differences help the steel achieve a higher surface hardness. Often used in construction and mining applications, it can also be found in a variety of other industries. I don't know just much more of a challenge AR500 might be to weld than AR400, but if AR400 is any indication, weld it with either 309L and 312 and if you ever manage to tear the skids off without ripping the mild steel it was welded to apart first I'd honestly be shocked. This wire is designed with 1% nickel and microalloying to produce welds with tougher weld joints. Carbon Equivalency (47) 1/8″ to 1″ Thicknesses. If you are looking to weld AR400 steel, you will need a welding torch and a welding machine. Use the smallest diameter electrode that will do the job. This specialized plate is designed for severe impact and abrasion applications. Search About Contact FAQ +86-371-86151827 [email protected]Share. Yes, plug weld = burn a hole in the top sheet to weld it to the bottom sheet. (Stick welding is preferred simply because of the tendency of the semi-automatic process to apply too great of a deposit. Sun Feb 14, 2016 7:01 pm A friend and I are thinking about building a couple of bullet traps. welding for the same heat or less heat input for the same speed. Largest selection of A514, T1, A572, A516, A588, AR400, steel plate at wholesale prices. Request a Quote. Chris, I welded some AR plate back in 1979 or 1980 built a hopper for a local rock quarry. The nickel and molybdenum content gives AR400 carbon steel the ability to resist wear better than all other carbon steel. 5" wall pins will be 2" welded to the. Custom sizes available. Excellent resistance to both impact and sliding abrasion at a moderate cost. The T1 steel offers great weldability and excellent strength, especially in below-zero temperatures. Remington Electric. Tweet. For certified companies, there must always be a certification standard stated (eg. WELDING AR400 & AR450 have excellent weldability that customers rave about and can be welded. The carbon content of 0. 6, the design values of the material properties and coefficients for structural steel are: Modulus of. Primarily used in military applications, but also in areas where high strength is required as both grades have elevated yield strengths (HY 80 – 80ksi, HY 100 – 100ksi). In stock and ready to ship. This may be necessary to avoid cracking of the weld metal or heat affected zone. Had to put two 5/8" holes in each cell to shoot foam in to fill annular space. AR400 Flat Bar TruWEAR AR400 Flat Bar is a low alloy steel flat bar, heat treated to a nominal hardness of 400 HBW. But there are rather notable differences. Senior Member. ). Public Auction: "Jeff's Welding and Machine" by Premier Machinery Auctions, LLC. AR400F is produced through austentizing, water quenching, and tempering. The Drip Cap. The number usually refers to the brinell hardness of the plate . include our Tensaweld Workmate for general purposes and Tensaweld Nickel-90 for increased tensile strength in the weld joint. About welding, structural engineering design, forming, bending, cutting, wear and sustainability experts. Welding gas costs depend on your cylinder size and the specific gas or blend. Oct 21, 2021 #8 52 Ford said: Heres something talking about welding AR400. Duplex and Super Duplex Stainless Steel (Grades 31803, 32750) 10I. What makes 1080 Steel so popular is the tensile strength of carbon steel. 1: Pre-heat the base material. The AR400 steel is Abrasion Resistant (AR) steel with a Brinell hardness of 400. Hardox® 400 is an all-around wear resistant steel. CMC Impact Metals’ advanced heat treating, quench and tempering process produces a superior hardness combined with high strength that results in a lightweight, strong and wear-resistant steel capable of withstanding harsh conditions. Over ½ to 1” 50-150F. Copper/Nickel 90-10 – C70600 Copper/Nickel 80-20 – C71000 Copper/Nickel 70-30 – C71500 Monel. The nickel and molybdenum content gives AR400 carbon steel the ability to resist wear better than all other carbon steel. Hardox makes Hardox 400, Hardox 450, and Hardox 500 so the steel has the. AR400 Steel Plate AR400 Steel Plate – Hardness 360-444 Brinell. Any hydrogen in the weld metal may diffuse into HAZ and may cause hydrogen embrittlement, resulting in. Originally posted by Sonora Iron View Post. A572 is the standard specification for high-strength low alloy columbium-vanadium structural steel. What is AR400 Steel? The Tensalloy ™ AR400 wear-resistant steel plate is a steel that provides greater impact strength than our other common heat treated alloys. It sports a high level of resistance to fatigue, has high ductility, and has good spring qualities useful for applications where flexibility is desired. and go all the way up to 13 in. Its all rusted and wore out. Use them for outdoor signs, cabinets, and doors. • High Tensile AR400 Skid Shoes • Lateral Float • Clearing width approx. However, it’s also more prone to shattering. Directions. This specific steel has good formability, weldability, and notch toughness when in the as-rolled condition. 00/pound. The nickel and molybdenum content gives AR400 carbon steel the ability to resist wear better than all other carbon steel. 1, W47. I got a funny look from the guys when I asked if I should be using straight co2. AR400 steel has a variety of benefits that makes it an ideal substitute for almost any application where excessive wear is a problem and ease of fabrication is needed. There’s really no single specific chemical composition for AR400 steel, as long as it meets the required hardness level. By MDG Custom Weld Date 06-17-2008 20:15. 8500. Additionally, mild steel is more ductile than AR400 steel, making it easier to work. Steel Plate & Sheet Alro Steel Metals Guide ASTM A-514 Plate *This grade of steel may be susceptible to cracking in the heat-affected zone of welds during post-weld heat treatment (stress relief). jackal Titanium. 3% brings the best machinability rate. For gas shielded flux cored use a gas mix with 20 to 25% CO2. The ones on it now are plain A36 steel in 1/2" X 7. At Ford Steel, we house a selection of AR steel hopper and chute liners from AR400 to AR500. Hardfacing, also known as hardsurfacing, is the application of buildup or wear-resistant weld metals to a part's surface by means of welding or joining. AR400 is 40 rockwell , right? Sent by freight using Tapatalk. The high-carbon alloy steel grades are determined on the hardness of the steel. AR plate is a high carbon alloy plate. Plates in Hardox ® 400 come in thicknesses from 2 to 130. Cutting. we set 30 volts with . The nickel and molybdenum content gives AR400 carbon steel the ability to resist wear better than all other carbon steel. Holding the steel at or near stress-relievingAs hard and tough as our wear plate, Hardox ® pipes and tubes offer outstanding performance when you need both high abrasion resistance and a lighter product. While the AR400 steel may seem similar to T1 steel, they’re actually quite different. wrenchbender. hardened surfaces, Ultima 601 becomes the ideal abrasion resistant product that can handle the rigors of extreme maintenance problems. 5 pounds. Available in thicknesses from 0. These long-lasting, abrasion-resistant steel pipes and wear-resistant steel tubes at a hardness of 400 HBW or 500 HBW can replace costly wear products like hard-faced overlay pipe and. 5". It is a high-carbon steel alloy that provides greater impact and sliding abrasion resistance by comparison. Also how well the welds will bond between the mild ( rusty ) steel and the Ar500. Carbon steel grade equivalents table for American ASTM, ASME, and SAE to Europe, Germany, Italy, France, and Japan. A load of handbooks, design guidelines, apps, material data library, calculators and FAQs. For example, ENDURA AR 430 has an initial hardness of 430 BHN but, as it withstands impacts, it will harden up to 560 BHN. BLUE AR500 requires using low-hydrogen-producing electrodes in welding. Everyone refers to wear plate as ARXXX because its like saying Kleenex. We would love to help you find what you are looking for. Relatively wide chemical and property ranges. Any hydrogen in the weld metal of AR400 steel plate may diffuse into HAZ and cause hydrog. The company formed and tacked everything and we just had to pour the wire to it. Cut about 20% stepover amount in your toolpath settings. challenge no. Sheet of 5' x 5' x 3/4" A36 Mild Steel K Tool 22 Ton Air / Hydraulic Bottle Jack. 96” x 288”. . Careful consideration should be given by competent welding engineers before stress relieving to weldments of this grade. Gun Weld Packs. Our "weld test" was merely to verify the preheat was high enough that the weld would break in the throat before a "chunk" would pull out of the base metal. Keep single pass fillet welds < 1/4 - < 6mm. Download Hardox Guarantees to see how you can ensure predictable fabrication in the workshop. It is 43. heat it up until a magnet is not attracted and quench in water. For instance, you can. The base steel around the weld rapidly heats and cools during welding, resulting in a heat affected zone (HAZ) with high hardness. In most cases you would preheat Q&T plates ( due to its hardenability tendancy ), expecially when you get into the higher harness. AR400 is quenched and tempered. D. 1 and W59. ASTM A656 Steel Plate Specifications. Below are the 6 keys to successfully (no cracking) welding AR plate. 50. On a flat section of 4' x 8' sheet I'll burn six roughly 1" dia. Hardox ® 600 has a nominal hardness of 600 HBW and a uniquely high toughness for such a hard steel. For AR400 I think E71-T8 is a much better choice. ShawnCulleton; New Member;. AR400, or AR400F. 5" (circles). ASTM A283 General purpose, low-cost structural quality plate. Kromite® #3 and Mirraloy® TGP Welding Guidelines; Kromite® CD Hardness and Strength Comparison Chart; Close; Mirro-Krome 60® (I. Rather than buy and weld adapters to the tooth body, I'm planning on flame cutting the body to the profile of the adapter then milling the end of the body to 1. Gas-shielded flux-cored wire offers versatility for welding AR plate to heavy equipment because it can be used. Weldability of AISI 4140 (4140 Steel Welding) Being Low alloy steel along with high carbon content & high carbon equivalent (C. Heating will remove the temper, we heat AR to soften it for drilling holes into it. (10) Spools of Alcotec "Almigweld ER4043" Spool Gun Spools. Hardox ® 600 has been successfully used in cement. At my local steel yard I can buy AR 400 (Abrasion Resistant) in 3/8 thickness for $1. Pipeline steels X65, X70, and X80 feature similar erosion-corrosion behaviour. Stay updated with our newsletter!Level III contractor for R. 48″, 60″, 96″, 120″. This is a high-carbon alloy steel that is perfect for rugged applications that require high wear resistance. The hardness and general flexibility of AR400 steel plates give them versatility. I've used it to make silhouette targets for our shooting range. jpg. Difficult to weld: Higher alloy and greater Carbon content require precise preheat and welding procedures. As with other abrasion resistant steels, it does not have a defined chemistry, but rather, grade is determined based on. The inside width of the tips is 1. Welding Solutions. 4140 steel properties. This hardness level makes AR Medium grades. This alloy wear plate offers excellent service for applications where formability, toughness, weldability and abrasion resistance are required. The base steel around the weld rapidly heats and cools during welding, resulting in a heat affected zone (HAZ) with high hardness. harbor freight welder . It’s often referred to as Hadfield steel, or Hadfield grade, as Sir Robert Hadfield discovered it in. (THIS IS NOT RECOMMENDED). D3 steel contains 1. AR400, or AR400F steel, is a high-carbon. Popular grades of Hardox ® AR steel include AR400, AR450, AR500, AR550, AR600 and Hardox ® 500 Tuf, our latest grade at 475-505 HBW, combining the best properties of AR450 steel and AR500 steel for high hardness, high toughness and wear resistance, especially for extreme-duty. AR400 is a specialty steel designed at the chemical level for improved wear resistance for very specific applications. One of the main disadvantages of AR400 steel is its high level of brittleness. It also contains small amounts of manganese, molybdenum, silicon, nickel, and copper. There is a lot of different steel grades as well as designation standards that are used depending on countries, company’s traditions and engineering practices. While the inner surface provides exceptional abrasion resistance, the outer surface cools slower, remaining more ductile, with a hardness of 250 BHN.